Facile exfoliation of MoS2 powders into nanosheets with excellent fluorescence quenching performance of perovskite

MoS 2 nanosheets of pure semi-conducting hexagonal phase (2H-phase) have lots of potential applications due to their unique and novel property, and the fluorescence resonance energy transfer is very easy to happen between zero-dimensional (0D) perovskite quantum dots and two-dimensional (2D) MoS 2 nanosheets. Herein, we demonstrate that a facile and green method to fabricate MoS 2 nanosheets by sonication-assisted exfoliation of MoS 2 powders in pure water after a hydrothermal reaction . The experimental results confirm that MoS 2 ultrathin sheets obtained from powders are monolayer and few-layer 2H-phase nanosheets with size of 100–300 nm. Interestingly, the as-prepared MoS 2 nanosheets have excellent performance to quench the fluorescence of CsPbBr 3 quantum dots. It can provide a new way for us to explore energy resonance transfer between 0D quantum dots and 2D layered materials.